New data from the Office for National Statistics (ONS) has laid bare the stark contrast between Birmingham's busiest neighbourhoods and its quietest suburbs. The figures, which record the number of residents per square kilometre, show that Sparkhill North is the city's most densely populated area, with 16,880 people living in a single square kilometre. At the other end of the spectrum, Walmley near the Warwickshire border has just 664 residents per square kilometre, making it the least crowded postcode within Birmingham's boundary.
Top Five Most Densely Populated Areas
The ONS maps, where dark blue shading indicates higher population density and light green lower density, highlight a concentration of crowded areas around central Birmingham. The top five most densely populated areas are:
- Sparkhill North – 16,880 people per sq km
- Smethwick South East – 11,612 people per sq km (technically in Sandwell, along the border)
- Selly Oak – 11,273 people per sq km
- Five Ways North – 9,987 people per sq km
- Saltley East – 9,982 people per sq km
Top Five Least Densely Populated Areas
In contrast, leafier suburban postcodes in the northern part of the city have far fewer residents. The five least crowded areas are:
- Walmley – 664 people per sq km
- Sutton Coldfield North & Park – 738 people per sq km
- Minworth – 752 people per sq km
- Little Sutton & Roughley – 1,687 people per sq km
- Four Oaks – 2,219 people per sq km
Geographical Divide
The data underscores a clear geographical divide: higher population densities cluster around central Birmingham, while the northern suburbs and more rural fringes experience far lower densities. According to the ONS, this pattern reflects the concentration of housing, transport links, and employment opportunities in the city centre and inner neighbourhoods.
